h1 {
    text-align: center;
    margin-bottom: 30px;
}

/* 新增下拉菜单样式 */
label {
    font-weight: bold;
    margin-right: 10px;
    font-size: 16px;
    color: #444;
}

select {
    padding: 12px 40px 12px 20px;
    font-size: 16px;
    border: 2px solid #007BFF;
    border-radius: 8px;
    background-color: #f8f9fa;
    background-image: url('data:image/svg+xml;charset=US-ASCII,<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M6 9L12 15L18 9" stroke="%23007BFF" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>');
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 320px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

select:hover {
    border-color: #0056b3;
    background-color: #e9ecef;
}

select:focus {
    outline: none;
    border-color: #0056b3;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

option {
    padding: 12px 20px;
    background-color: white;
    color: #333;
    font-size: 15px;
    transition: background-color 0.2s;
}

option:hover {
    background-color: #007BFF !important;
    color: white;
}

option:checked {
    background-color: #e3f2fd;
    font-weight: 500;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table, th, td {
    border: 1px solid #ddd;
    text-align: center;
}

th, td {
    padding: 8px;
    text-align: center;
}

th {
    background-color: #f2f2f2;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}
